Removes WindowState::aura_window()

ash/wm/aura/wm_window_aura.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ASH_WM_AURA_WM_WINDOW_AURA_H_
 #define ASH_WM_AURA_WM_WINDOW_AURA_H_
 
 #include "ash/wm/common/wm_window.h"
 #include "base/macros.h"
 #include "base/observer_list.h"
@@ skipping 98 matching lines @@
   void StackChildAbove(WmWindow* child, WmWindow* target) override;
   void StackChildBelow(WmWindow* child, WmWindow* target) override;
   void SetAlwaysOnTop(bool value) override;
   bool IsAlwaysOnTop() const override;
   void Hide() override;
   void Show() override;
   bool IsFocused() const override;
   bool IsActive() const override;
   void Activate() override;
   void Deactivate() override;
+  void SetFullscreen() override;
   void Maximize() override;
   void Minimize() override;
   void Unminimize() override;
   std::vector<WmWindow*> GetChildren() override;
   void SnapToPixelBoundaryIfNecessary() override;
   void AddObserver(WmWindowObserver* observer) override;
   void RemoveObserver(WmWindowObserver* observer) override;
 
  private:
   // aura::WindowObserver:
@@ skipping 12 matching lines @@
 
   base::ObserverList<WmWindowObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(WmWindowAura);
 };
 
 }  // namespace wm
 }  // namespace ash
 
 #endif  // ASH_WM_AURA_WM_WINDOW_AURA_H_